Gym memberships in India have exploded, and so has a very specific pair of complaints in our clinic: lower back pain after deadlifts, and knee pain after squats. Both lifts are safe, both are worth doing for life, and both punish the same two errors, loading faster than you adapt and lifting through fatigue.
Here is how to read each pain, and what to do about it.
Lower back pain after deadlifts: three different things
1. Ordinary muscle soreness. Symmetrical, spread across the lower back, appearing the next day and peaking around 48 hours, easing with gentle movement. The spinal erectors worked hard and are telling you so, exactly as described in our muscle soreness guide. This is normal, especially after new volume, and needs nothing but a lighter few days.
2. A muscle strain. One sided, sharp during a specific rep or the day after, painful with bending and straightening back up. Uncomfortable but benign: it settles over one to three weeks with relative rest and a gradual return, the same first two weeks we describe for any acute back episode.
3. Pain with leg symptoms. Pain running below the knee, pins and needles, numbness or weakness in the foot suggests an irritated nerve root, covered in our slipped disc guide. Most of these also recover well, but the plan is different and worth getting right, so get assessed rather than guessing.
The question is never "is my back sore?" after heavy pulling. It is "is the soreness symmetrical, muscular and fading?" If yes, that is training. If it is one sided, sharp or travelling down a leg, that is information.
The errors that actually cause it
Rounded backs get all the blame, and the truth is more precise. A moderately flexed spine lifting a sensible load is not the disaster it was once painted as; spines flex, and strong ones tolerate it. What reliably hurts people is the combination:
- Load jumps. Adding 10 kg because the last set felt easy, week after week
- Grinding reps through form breakdown. The last two reps where the hips shoot up and the bar drifts away are where most strains live
- Deadlifting heavy while exhausted, at the end of the session or the end of a bad week
- No exposure to the hinge pattern before loading it, straight from desk to barbell
The fix is unheroic: own the hinge with light weight, add load in small steps, leave one or two reps in the tank on work sets, and treat sleep deprived days as light days.
Knee pain after squats
The same logic applies one joint down. An ache around or behind the kneecap after squatting is nearly always patellofemoral overload, the same condition as runner's knee: the joint was loaded beyond its current tolerance, not damaged. The usual triggers are sudden depth changes, sudden volume, and knees collapsing inward on the way up, which points to hip strength rather than knee damage.
Pain below the kneecap on the tendon after jumping and squatting is patellar tendinopathy, and pain with locking or giving way deserves a look at our meniscus guide and an assessment.
For the common patellofemoral version: shorten the range to the depth that does not provoke, keep squatting there, strengthen the hips with glute bridges and side lying hip abduction, and rebuild depth over weeks. Complete rest, as ever, quietly makes the knee weaker while you wait.
Returning to the bar after a back strain
- Days 1 to 3: keep moving, walk often, avoid the lift that provoked it. Not bed rest.
- Once daily movement is comfortable: re-earn the hinge unloaded, then with a light bar. Glute bridges, bird dogs and dead bugs from our core foundations set rebuild the trunk support underneath it.
- Week by week: add load in steps of ten to twenty percent of the previous week, staying two reps shy of failure, until you are back at prior numbers. Most simple strains allow a full return inside four to six weeks.
Get it assessed if
Pain travels below the knee, anything is numb or weak, pain wakes you repeatedly at night, symptoms follow a maximal lift and are not improving after two weeks, or this is the third episode this year. Recurring gym injuries are a programming problem wearing a medical costume, and fixing the programme is a one visit conversation.
The barbell is not the enemy. Lifting badly programmed is. Train the lift, respect the recovery, and the deadlift becomes what it should be: the best back insurance you own.